/*
 * $Id: 407f92eb747d13947ea3443a0912eb8ef33322de $
 *
 * This file is part of the iText (R) project.
 * Copyright (c) 2007-2015 iText Group NV
 * Authors: Bruno Lowagie et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
package com.itextpdf.rups.io.listeners;

import com.itextpdf.rups.view.itext.PdfTree;
import com.itextpdf.rups.view.itext.treenodes.PdfObjectTreeNode;

import javax.swing.event.TreeExpansionEvent;
import javax.swing.event.TreeExpansionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;

/**
 * Listener that checks if the expanded node has one child. If it has one child it should expand it.
 * @author Michael Demey
 */
public class PdfTreeExpansionListener implements TreeExpansionListener {

    public void treeExpanded(TreeExpansionEvent event) {
        PdfTree  tree = (PdfTree) event.getSource();
        DefaultMutableTreeNode node = ((DefaultMutableTreeNode) event.getPath().getLastPathComponent());
        if ( node.getChildCount() == 1 ) {
            TreeNode child = node.getChildAt(0);
            tree.selectNode((PdfObjectTreeNode) child);
            tree.expandPath(new TreePath(((DefaultTreeModel) tree.getModel() ).getPathToRoot(child)));
        }
    }

    public void treeCollapsed(TreeExpansionEvent event) {
    }
}